HOW TO TEST MOTORS

[lor]

HI ALL,
My job requires me to test 3 phase motors . I have a clamp meter and have taken readings but am unsure what to look for . On some motors all 3phases read the same ,others the readings are different between the 3 phases .

the motors are turning fans fitted to industrial boilers .

any advice gratefully recieved

thanks

 

[briwire]

On a standard 3 phase motor, all three phases should read approximately the same current. By approximate, I mean 3.4/3.5/3.3 amps, for examle.